/Engine/Source/Runtime/GameplayTags/Classes/GameplayTagsManager.h
Check to see how closely two FGameplayTags match. Higher values indicate more matching terms in the tags.
the length of the longest matching pair
int32 GameplayTagsMatchDepth ( const [FGameplayTag](API\Runtime\GameplayTags\FGameplayTag) & GameplayTagOne, const [FGameplayTag](API\Runtime\GameplayTags\FGameplayTag) & GameplayTagTwo ) const